直接测量电导率的方法—深差法

The Direct Measurement Method of Conductivity Different Depth Method

摘要: 本文利用精确测量坩埚型电导池的尺寸以及不同插入深度的电阻值,并根据下列公式:\\beginarrayl\sigma = \frac12\pi \Delta \rmh\rm(\frac\rm1\rmR_\rm2\rm - \frac\rm1\rmR_\rm1\rm)ln(\frac\rmD_\rm2\rm - m\rmD_\rm1\rm - m\rm \bullet \frac\rmr_\rm1\rmr_\rm2\rm)\\\rm或\\\sigma = \frac\rmK^*\Delta \rmh\rm(\frac\rm1\rmR_\rm2\rm - \frac\rm1\rmR_\rm1\rm)\endarray\直接计算出电导率。因而可以省去利用已知电导率的溶液来标定电导池常数。这种方法简化了实验步骤,其结果也是精确的。

Abstract: By taking the exact size of the conductivity cell as well as the resistance values at diffevent depth, the conductivity was calculated using the following equation:\\beginarrayl\sigma = \frac12\pi \Delta \rmh\rm(\frac\rm1\rmR_\rm2\rm - \frac\rm1\rmR_\rm1\rm)ln(\frac\rmD_\rm2\rm - m\rmD_\rm1\rm - m\rm \bullet \frac\rmr_\rm1\rmr_\rm2\rm)\\\rmor\\\sigma = \frac\rmK^*\Delta \rmh\rm(\frac\rm1\rmR_\rm2\rm - \frac\rm1\rmR_\rm1\rm)\endarray\Therefore, the procedure of demarcating the constant of the conductivity cell by using a know solution can be omitted.With this new mefhod, the experimental procedure has been simplified and the results proved accurate.